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-rw-r--r--src/gui/image/qbmphandler.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp
index 854be2e..42e19b8 100644
--- a/src/gui/image/qbmphandler.cpp
+++ b/src/gui/image/qbmphandler.cpp
@@ -144,7 +144,7 @@ static QDataStream &operator<<(QDataStream &s, const BMP_INFOHDR &bi)
static int calc_shift(int mask)
{
int result = 0;
- while (!(mask & 1)) {
+ while (mask && !(mask & 1)) {
result++;
mask >>= 1;
}